Christian h



l(No Model.)

` O. H. GOEBEL.

,CHAIN BULT. N0..252,309, l PatentedJa'n. 17,1882'.

UNITED y STATES vPATENT OFFICE.Y

CHRISTIAN H. GOEBEL, OF PHILADELPHIA, PENNSYLVANIA. i"

CHAIN-BOLT.

SPECIFICATION forming part of Letters Patent No. 252,309, dated January1'7, 1882.

Application tiled Aprl 22, 1881.

To all whom it may concern.:

Be it known that I, CHRISTIAN H. GOEBEL, a citizen of the United States,residing in the city and county of Philadelphia. and State ot'Pennsylvania, have invented a new and useful Improvement in Chain-Bolts,which improvement is-'fully setforth in the following specitication andaccompanyingdrawings,iiwhich- Figure l is a side elevation, partlybroken away, of the chainfbolt embodying my invention. Fig. 2 is a viewof the inner face thereof.` Fig. 3 is a transverse section in line mw,Fig. 2.

Similar letters of reference indicate corresponding parts in the severalfigures.

My invention consists of a chain-bolt formed of a slotted plate havingserrations on its iny ner tace, and a button having a cross-head and aconnected springactuated pusher, whereby the button may he locked atvarious points to the connecting-plate; and, furthermore, before thebutton can be removed `it requires to be rotated, thus making the boltdoubly secure.

Referring to thedrawings, A represents the slotted plate ofa chain-bolt,and B the button thereof. The inner face of the `plate A, onoppostesides of the slot d thereof, has a row of serrations, b b, with whichareadapted to en-- gage teeth c o't' a cross-head, C, which latterisconnected to a stem or pusher, I), passed freely through the button` B,and having its beati projecting above or beyond the latter fordeplessing or forcing` in the pusher, 'whereby f motion in one directionmay be imparted to the cross-head, the return motion whereot beingaccomplished by a spring, d, suitably connected to the pusher andbutton.

length or transverse direction of the cross-head C-thnt is, transverseto the slot a--is greater than the largest diameter ot' said slot,whereby the ends or teeth of said cross-head fully engage with theserrations "b, and the button requires to be rotated in order to beconnected to-and removed from the plate A.

The operation is as follows: The slotted plate A and chain-plate A' aresecured in position as usual. The button `B is turned so .that 'thelength of the cross-head registers with the longitudinal direction ofthe slot et, and the TheV (No model.)

the serrations orv teeth 1),and thus the button is locked to the plate.In order to unlock the button, it is necessary to move the pusher sothat the cross-head leaves the serrations b.

The button is then slipped4 toward the wide the ends or teeth of thecross-heads drop into end ot' the slot a and turned or rotated so thatthe cross-head registers `with said slot, and

thus the button maybe entirely displaced from the pfate A.

In practice the cross-head will be made so long that the pusher isnecessarilyl depressed,

in order to separate the cross-head from `the 7 neck of the button andpermit easy insertion of the cross-head and neckw of the button 'intothe wide en d of the slot, the chain then being stretched and taut. y

The door to which the bolt is applied may besecured when opened t'o suchextent that a hand cannot be inserted from the outside. Pressure .on thedoor will not cause the sliding movement of the button as inchain-boltsheretotore constructed, and the consequent further opening ofthe door, the button being held locked to the plate wherever the buttonis stopped, the cross-head then engaging with the serrations b at thecoincident place. As the button is locked to the plate A, and requiresfirst to be unlocked and then rotated before it can be disengaged fromthe plate, the

"chain-bolt-is doubly secure, as is evident.

Having thus described my invention, what I. claim as new, and desire tosecure by Letters Patent, is

The locking chainbolt consisting of a slotted plate with serrations onits inner face, and l abutton havinga cross-head witha connected

